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PREFACE TO THE FIRST EDITION
organic substances on a broader and therefore more rational
1 The present occasion seems opportune to direct attention to
the fact that one of the most familiar, most readily procurable
and most cheaply produced of all organic materials is placed
beyond the reach of many students by the heavy duty levied
upon it. May I, in the name of teachers of organic chemistry,
.appeal to the Board of Inland Revenue, on behalf of scientific
and technical education, to .provide institutions for higher
education in science with a limited quantity of pure alcohol
free of duty, thereby placing schools of chemistry in this
country in the same position as those on the Continent ?
In conclusion I desire to thank Dr. J. McCrae, who has
written the section on Ethyl Tartrate and the use of the Polari-
meter, Dr. T. S. Patterson, who has been kind enough to look
Ľover the proofs, and Mr. H. D. Dakin, who has given me sub-
stantial assistance in the practical work of revision.
J. B. COHEN.
THE YORKSHIRE COLLEGE,